---
schema_version: "secwatch.filing_event.v1"
accession: "0001213900-26-034902"
form_type: "8-K"
ticker: "ONCO"
cik: "0001782107"
company_name: "Onconetix, Inc."
filed_at: "2026-03-27T23:59:59+00:00"
generated_at: "2026-05-15T08:40:11.868588+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.5
calibrated_materiality_score: 0.5
confidence: "high"
source: SEC EDGAR
---

# Onconetix implements 1-for-5 reverse stock split to maintain Nasdaq compliance

## Summary
- Reverse stock split effective March 25, 2026 at 12:01 a.m. Eastern Time.
- Ratio fixed at 1-for-5, reducing outstanding shares from ~3.6M to ~0.7M.
- No fractional shares issued; cash compensation based on March 24 closing price.
- CUSIP changes to 68237Q 302; stock trades under symbol ONCO on Nasdaq.
- Split intended to meet Nasdaq's $1.00 minimum bid price listing requirement.

## SEC filing metadata
- accession: 0001213900-26-034902
- form_type: 8-K
- ticker: ONCO
- cik: 0001782107
- company_name: Onconetix, Inc.
- filed_at: 2026-03-27T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.5
- calibrated_materiality_score: 0.5
- confidence: high
- sec_items: 5.03, 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1782107/000121390026034902/0001213900-26-034902-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1782107/000121390026034902/ea0283569-8k_onconetix.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001213900-26-034902
- JSON: https://secwatch.observer/filing/0001213900-26-034902.json
- Plain text: https://secwatch.observer/filing/0001213900-26-034902.txt

## Key facts
- Governance Changes
  Onconetix, Inc.: Onconetix, Inc. filed an amendment to its Amended and Restated Certificate of Incorporation to effect a 1-for-5 reverse stock split, effective March 25, 2026 (effective 2026-03-25).
  - Change: charter amendment
  - Effective: 2026-03-25
  source text: On March 24, 2026, the Company filed the Amendment to its Charter with the Secretary of State of the State of Delaware to effect the Reverse Stock Split.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1782107/000121390026034902/0001213900-26-034902-index.htm

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.